One of the fan speeds for my heat stopped working the other day. The other 3 work fine though. Any idea's what would cause this, or how I go about fixin it?

 

most likely a bad switch in the dash

 

Prob the blower motor resistor.

 

isnt that the switch?

 

x2. They go out. Could be the switch, but unlikely. It's easy to diagnose though, if you have a basic understanding of how to use a VOM. Sometimes the resistors can be diagnosed by eye - it will look burned.

 

X3. Do not touch it when it is hot though.

 

Where is the blower motor resistor located? I need to replace mine as I have no fan speeds (believe it is running on low if at all). Bought the new resistor the other day, is it just under the dash as it is in a lot of vehicles?

 

Also like to know where this resistor is

 

its under the passenger side dash. its a black oval type thing with 2 screws and a 4 prong plug.

Your problem could be anything though..

I've been trying to get help on my heat issue since I bought the jeep a year ago, no luck so far. Just replaced the resistor again with a brand new one. Today it worked when heated up but then stopped next time I started it cold.

Read the last post in this thread.
https://www.cherokeeforum.com/f2/ple...comment-69108/

 

xjs have a common problem with melting the plug on the control switch on the dash

 

Its your resistor... but resistors go bad because the blower motor over heated it... so u have to replace them both... under pass side dash... 2 to 3 wire plug probly...

 

My heater control switch now only works in position 4 does this mean the module under the dash needs to be replaced ?

 

Ok so where do you get a new plug? And how do you install it?

 

means u need a new blower resistor AND a new blower motor...

junkyard and have to plice it on if the plug is melted...

 

I replaced the switch and that fixed the problem. Switch was all burnt up, aswell the plug was melted a bit :S. switch was 18$ straight from the dealership